Soil bio-cementation treatment strategies : state-of-the-art review
Bio-cementation is a new sustainable approach that has gained popularity due to its low energy and carbon dioxide footprint compared with those of existing technologies for geotechnical and geoenvironmental engineering applications. Bio-cementation is a soil improvement technique that involves bind...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Thomas Telford Ltd.
2023
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/42395/1/Soil%20bio.pdf http://ir.unimas.my/id/eprint/42395/ https://www.icevirtuallibrary.com/doi/full/10.1680/jgere.22.00051 https://doi.org/10.1680/jgere.22.00051 |
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| Summary: | Bio-cementation is a new sustainable approach that has gained popularity due to its low energy and carbon dioxide
footprint compared with those of existing technologies for geotechnical and geoenvironmental engineering applications. Bio-cementation is a soil improvement technique that involves binding the pore space of soil particles
with calcium carbonate minerals by microbially induced carbonate precipitation (MICP) and filling the soil pore space.
The purpose of this paper is to present the current state of the art and a comprehensive discussion on the development of bio-cementation for soil improvement/reinforcement. Premixing, injection, immersing and surface percolation are identified as four distinct bio-cementation treatment techniques. Furthermore, scholars have reported employing ureolytic bacteria such as Sporosarcina pasteurii, Bacillus sphaericus and Lysinibacillus sphaericus isolated
from corals, limestone caves, soils, waste materials, seawater and other sources to accomplish effective biocementation. Some of the major issues (bacterial cultivation costs and ammonium production) that impede its
industrial potential and promising remedial techniques are also discussed. This state-of-the-art review also discusses
the benefits and drawbacks of bio-cementation compared with traditional approaches. The significance of enzymeinduced carbonate precipitation as a soil bio-cementation alternative to MICP is also highlighted. Finally, the
sustainable procedure, bio-cementation principles and future implications are discussed. |
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